Celina Raddatz quit her job at a nursing home in 2014 when she realized she would have to take care of her mother full-time. Raddatz's mother, Guadalupe Pena Villegas, 83, suffers from Alzheimer's and bipolar disorder, a combination that sometimes makes her a danger to herself and others, and thus requires her to be supervised 24 hours a day.

Authorities in Austin, Texas, responded to an explosion in the southwest part of the city late Sunday, with the city's emergency medical service tweeting that it caused two serious but non-life-threatening injuries.

Britain is accusing Russia of manufacturing and stockpiling a deadly nerve agent in violation of international law. Foreign Secretary Boris Johnson says he has evidence that Russia has been creating and storing the toxin, which was recently used to poison a former spy in England.

Congressional Republicans say they still support special counsel Robert Mueller's investigation into Russian election interference even as the president continued his offensive Sunday against the investigation, as well as a recently fired high-ranking FBI official, Andrew McCabe.

Trump sent a flurry of tweets Sunday morning, in which he painted the Mueller-led special counsel probe as a politically biased witch hunt.